bullock



O. M. BULLOCK CULTIVATOR Oct; 21, 1930. Re. 17,837

origgflal Filed April 18, 1922 9- z 16 15 Reissued Oct. 21, 1930 UNITED STATES am M. BULLOCK, or OAKLAND, CALIFORNIA CULTiVATOR Original I'm 1,657,064, dated January 24, 1928, Serial No; 554,766, filed. April 18, 1922, and renewed July 13,1927. Application for reissue filed October 19, 1929. Serial No. 401,019.

My invention relates to an improvement in cultivators and more particularly to a rotary cultivator having resiliently acting blades which'are sprung out of the ground with a shovel action whereby the soil is thoroughly broken and finely cultivated.

The device of my invention comprises a body which is adapted to be rolled over the round and which by its own weight, or an additional force having a downward component, drives or forces blades into the soil against an energy storing medium: and on continued rolling of the body the stored energy is used to actuate the blades to loosen, turn, lift or otherwise cultivate the soil- The blades are mounted on a' suitable body, which may be rolled, and connected thereto to project in advance of the body, contact with the soil in advance thereof, by the weight of the body be forced into the soil, and at the same time cause a storage of energy which, on the further rolling of the body is released to pull the blades through the soil and give them a lifting action to the rear-of the body, the blades being substantially at rest in relation to thesoil when directly underneath the main part of the rolling body.

One, embodiment of my invention which I have successfully used is an appliance coinprising a reel or drum having arms mounted thereon for carrying ground blades which are related to the drum'through an energy storing means in such a way that energy is stored asthe blades are forced into the'ground by the advancing or rolling drum and in such a way that the energy is subsequently released to expel the blades from the ground forcibly and concomitantly break up the'soil. The drum is advanced with a simple, rolling motion in the manner of a wheel and without any additional rotary movement. My device is thus not to be'confused with cultivators which have'resilient or resiliently mounted blades on reels or'drums that are positively-rotated, dragengaging.

ging the blades through the soil, whether theseare pulled along the ground and ro tate in the direction of travel, the reverse thereto or crosswise. i

In the drawings,"

Fig. 1 is a plan view of my cultivator with the front portion of the frame thereof broken away. f

Fig. 2 is a transverse vertical section of my cultivator taken on line 22 of Fig. 1..

Fig. 3 is a. fragmentary longitudinal sec-; tion through one end of my cultivator.

In the drawing 1 indicates frame on the rear end of which are sleeves 22 in which are keyed the ends of a transverse shaft 3 by means of keys 4. On the shaft 3 between the bearings 22 is journaled a reel 5 com-; prising a sleeve 6 surrounding said shaft. and disk heads 77' secured to, the ends of said sleeve by bolts 8 and nuts 9, which boltsextend through: annular flanges 1010 onthe ends of said sleeve and through said heads. The heads 7+? are formed in their inner sides near their peripheries with 'annular flanges 1111. Arcuate blade-levers 12, preferably six in number are pivoted at their ends outside the flanges 1111 with their convex sides outward to the inside of.

eries'and through inturned flanges 14-14:

on the ends of said levers, the' inner ends of said levers and flanges 1414.- being adapted to engage the flanges 11-11 to limit the outward movement of the levers. Comb-toothed blades 15 are secured to the outer ends of the levers 12 respectively, said blades ex;

tending outwardly and radially from said levers. Inwardly" extending arms 16 preferably'three in number are secured to the inner edge-of each blade lever 12 atjsuitable distances apart. Springs 17 respectively connect the arms 16 of each blade lever 12 to the corresponding arms 16 of another blade lever, which springs normally vtendto 20 rectly under the shaft? andthat itis practically only the released energy of the spring hold the levers and their blades in their,

1 outermost position, but yieldto allow the blades and levers to swing inwardly when they engage the ground as shown in Figure 2.

As the reel -5 rolls in the direction of arrow (Fig. 2), the blades 15 engaging the soil swing inwardly on their pivots and expand their springs 17 so that as the reel continues to roll and begins to withdraw said blades from the soil said springs contract and throw said blades outwardly at the rear out of the soil with a shovel action, thus thoroughly digging and breaking up the soil and finely cultivating the same. It" will be evident that-in the operation of the machine, energy is stored in each spring when i i ever one ofthe lever arms to which it is at- 1 which turns or cultivates the soil reel would not touch the ground. 3'0" 'silientmeans or springs opera-tively contached passes under the reel,that the blades are substantially stationary in the soil di- It will be obvious that my appliance "may be varied considerably to suit special cir cumstances, that'it couldbe' attached to tractor wheels, the track of a track-laying tracthe.

tor or made with stifi' springs, so that In some of the claims the designation renecting the arms and thebody? isvused. It will be observed thateach of the arms 16 by the spring, the pivotal connectionofthe opposite arm and the stop is" operatively connected from thearm to the'body A spring from each arm could. be ''connected, directly to the body or. reel, but this would necessitate doublethenumber ofisprings; a It is to be understood that I do not limit myself to the'form of the cultivator shown and described herein, j as the invention, as

set forth in the following claims may be em:

l i a. reel journaled on said frames a plurality bodied in a. plurality of forms.

Iclaima 1; In an agricultural.implement,xa frame,

of blade leversp'ivotally mountedonsthe reel,

.said levers onthe portion outside" thereel being curved] substantially similar-to the 3 periphery-of the reel, blades-secured on the:

theinner edges ofthelevers, and springs con-* necting the arms of; each leverwith corre-' sponding arms of another-lever for normally" holdingsaid levers and, their blades swung outer endoffsaid levers, arms extending from outwardly, from said reeli,

1 f2 InQan agriculturalimplement, aframe, a reel journaled. on said frame, av'plurality of bladelev'ers pivotally'mounted onsaid reel, blades 'soured on the outer ends ofsaid levers,

arms extending from the inner edges of said.

. levers, and springs connecting the "arms of each lever with corresponding arms, of another lever for normally holdingsaid levers and their blades swung outwardly from said.

reel.

3. In an agricultural implement, a itrame, r.

arevolvable member journaled on said frame,

a plurality of levers mounted on said revolvable memberg-ublades-on said levers, and a single yielding meansfor normally holding a plurality of said levers and their blades swung-outwardly from the revolvable mem berv 5. A cultivator comprising a reel adapted.

to'roll overthe ground, a-pairo arcuate levers pivotedtosaid reel, a tension spring connecting the inner ends of said levers, and a radial blade carried by eachof said levers;

6. A cultivator comprising a rotatable member, arcuate levers]pivotally'mounted on said member, blades secured tothe outer ends of said levers, arms secured-to the inner ends of: said levers, and meansengaging said arms for normally urglngsaldlevers" outwardly from said rotatable member. 1

7 A cultivator cor'nprising; a rotatable member, a plurality of 'arcuate ylevers .piv-

otally mounted on said, member, blades secured to' theouter ends of: said? levers, arms secured to. the innertends. of, 'said levers, and

springs connectedtosaid arms for. normally urging said levers outwardly from; said rotatable men iberg 3 8.. A. cultivator comprising. airotatable member adaptedto be rolled over the; ground, a plurality --:of, arcuate plates resiliently 'mounted on. said rmember, and iground 811- gaging bladesjon saidplatesu 9LA cultivator; adapted to advance in, a I predetermined; direction" comprising, a re-- tatable member adapted, during said advance,

toqbe rolled over the "ground aboutfan axis transverse tosaid; direction, a: plateresiliently mounted onsaid member, blade on said plate said plateand. blade-being adapted to" contact withthe-j ground in advancezof said 1 member. and to remainstationary foran a'ppreci able period, said blade being adapted to. be forced into the ground upon the rollingof saidmember, and means for normally'urging said plate outwardly frbmfsaid member, said. means being adapted to force said blade out of the ground-upon continued" rolling of said member.--

'10, A cultivatoradapted to advance ina predetermined direction comprising m tat able member "adapted; during said} ad-' vance, to berolled :overthe ground about an, axis 'tran'sverset'o "said direction, a, plate resiliently mounted on said member, a blade on said plate; said plate and blade being adapted to contact with the ground in advance of said member and to remain stationary foran appreciable period, said blade being forced into the ground upon the rolling of said member and being forced out of the ground upon the continued rolling of said member.

In testimony whereof, I have hereunto set my hand.

GRIN M. BULLOCK. 

